问题
I'm trying to use cpp-netlib with Visual Studio 2010. I've built cpp-netlib and add .lib files to my project, but I can't compile them.
--Environment
- Windows 7 x64
- cpp-netlib 0.11.0
- boost 1.55.0
- Win32 OpenSSL v1.0.1f
My code is here.
#include <boost/network/protocol/http/client.hpp>
#include <iostream>
int main(int argc, char *argv[]) {
using namespace boost::network;
if (argc != 2) {
std::cout << "Usage: " << argv[0] << " [url]" << std::endl;
return 1;
}
http::client client;
http::client::request request(argv[1]);
request << header("Connection", "close");
http::client::response response = client.get(request);
std::cout << body(response) << std::endl;
return 0;
}
I added the cpp-netlib library path and the cpp-netlib include path to the project. Boost and openssl paths were also added. I added the libs to the project.
- libboost_system-vc100-mt-gd-1_55.lib
- libboost_date_time-vc100-mt-gd-1_55.lib
- libboost_regex-vc100-mt-gd-1_55.lib
- cppnetlib-client-connections.lib
- cppnetlib-uri.lib
I think the errors come from something related OpenSSL.
Error 55 error LNK2019: unresolved external symbol - function _BIO_ctrl ...
Actually, I have Japanese one so it's like below.
エラー 55 error LNK2019: 未解決の外部シンボル _BIO_ctrl が関数 "public: class boost::system::error_code const & __thiscall boost::asio::ssl::detail::engine::map_error_code(class boost::system::error_code &)const " (?map_error_code@engine@detail@ssl@asio@boost@@QBEABVerror_code@system@5@AAV675@@Z) で参照されました。 cppnetlib-client-connections.lib(client.obj)
エラー 57 error LNK2019: 未解決の外部シンボル _BIO_ctrl_pending が関数 "private: enum boost::asio::ssl::detail::engine::want __thiscall boost::asio::ssl::detail::engine::perform(int (__thiscall boost::asio::ssl::detail::engine::*)(void *,unsigned int),void *,unsigned int,class boost::system::error_code &,unsigned int *)" (?perform@engine@detail@ssl@asio@boost@@AAE?AW4want@12345@P812345@AEHPAXI@Z0IAAVerror_code@system@5@PAI@Z) で参照されました。 cppnetlib-client-connections.lib(client.obj)
エラー 43 error LNK2019: 未解決の外部シンボル _BIO_free が関数 "public: __thiscall boost::asio::ssl::detail::engine::~engine(void)" (??1engine@detail@ssl@asio@boost@@QAE@XZ) で参照されました。 cppnetlib-client-connections.lib(client.obj)
Could you tell me what I'm missing? I tried to add more libs to the project, but it still didn't work.
回答1:
I should've got to add these two library.
libeay32.lib ssleay32.lib
回答2:
I ran into the same problem, except i fixed it by using the WIN32 version of SSL instead of the X64 version.
来源:https://stackoverflow.com/questions/22682678/how-to-use-cpp-netlib-with-visual-studio-2010